Method of and apparatus for coating cores



25 1927. J. s. LITTLE METHOD OF AND APPARATUS FOR COATING CORES FiledAugust 29, 1924 3 Sheets-Sheet 1 JEZUQTZZEW ncfafimSwyw ymm Jan. 25,1927. 1,615,395

J. S. LITTLE METHOD OF AND APPARATUS FOR COATING CORES Filed August 29,1924 3 Sheets-Sheet 2 Jan. 25, 1927.

1,615,395 J. 5. LITTLE METHOD OF AND APPARATUS FOR COATING CORES FiledAugust 29, 1924 s Sheets-Sheet 5 V Patented Jan. 251927.- I

UNITED STATES PATENT JOHN SHIRLEY LITTLE, OF LA "GRAN GE, ILLIE'OTS,ASSIGNOB TO WESTERN COMPANY, INCORPORATED, OF 1\TEW YORK, N. Y., A.CORPORATION OF NEWiYOBI.

METHOD OF APPARATUS FOR COATING OORESJ.

AppHcationmed August 29,1924. Serial No. 784,874.

Fig. 5 is a plan section taken on line V This invention relates to amethod of and apparatus for coating cores, and more particularly to amethod of and apparatus for coating cores with pulpous material.

5 The object of the invention is to apply pulpous material.- to aplurality of spaced coresin such manner that the pulpous materialbecomes ap-coating common to said cores, the coating being attached tothe cores l by the intermingling of, the fibers of the pulpous materialso tliat'no adhesive substance need be used.

In one embodiment of the invention, the improved method is practiced bymeans of 15 apparatus adapted to produce an article described in myco-pending application Serial No. 7 34,87 filed August 29, 1924, andcomprising a plurality of spaced electrical conf ductors iii-strandform'coated with a com- 20 mon covering of pulpous materialwhich isattached to the conductors solely by the inter'mingling of the fibersthereof.

In accordance with the features of the invention, the plurality ofelectrical conduc- 5 tors are simultaneously subjected to a liquidcontainingpulp in such manner that a rib bon of wet pulp is applied tothe conductors, the conductors being held in spaced relation while theribbon" is being formed. Excess moisture is removed from the ribbon andit is wrapped around itself and the conductors to form a uniform coatingfor the conductors which are drawn toward each other during'the wrappingo eration to impress and clamp some of the brous pulp between them. Thecoating is then dried. It insulates the conductors ,from each other.

The word pulp? as used'in the specification and claims is to beunderstood as defining and including any'cohering fibrous mass whethersuspended in a liquid, moist, or substantially dry. t i

Other features of the invention will become apparent asthe detaileddescription progresses, reference being had to the accompanyingdrawings, wherein- Figs. 1 and 2 are complementary parts of a plan viewpartly in section of. apparatus embodying the invention;

, Figs. 3 and 4 are complementary parts of a longitudinal sectionthrough the apparatus shown in Figs. 1 and l;

of Flg. 4;

Fig. 6 is a section taken on line 66 of Fig. 5, and

Figs. 7 to 10 inclusive are enlarged transverse sections whichprogressively illustrate the inanner in which the apparatus shown inFigs. 1 to 6 inclusive forms a common coat ing of pulpous material upona plurality of electrical conductors in strand form.

It is believed that a complete understanding of the improved method willbe procured from a description of apparatus by means of which the methodmay be practiced.

The improved apparatus shown in the accompanying drawings is adapted toapply a common coating of paper to a plurality of electrical conductorsin strand form, the coated conductors constituting the aforementionedarticle described in my copending application Serial No. 734,875, filedAugust 29,1924.

One end of the apparatus first subjects the electrical'conductors to aliquid containing pulp which is suitable for the manufacture of paper,the conductors being subjected to the liquid containing pulp in suchmanner that a ribbon of wet pulp is deposited upon the conductors whilethe apparatus then removes excess moisture from the wet pulp and formsit into a uniform coating or the conductors, .which coating is subsequently dried.

That end of the apparatus which is adapted to subject the electricalconductors to the liquid containing pulp and to remove ex; cess moisturefrom the ribbon-0f wet pulp is termed the wet end of the apparatus andis indicated by the reference character .in the drawings. The wet end 15comprises a drum 16 partly submerged in a liquid containing pulp held ina tank 17. The drum 16 comprises a pair of spiders 18 secured to a shaft19 rotatably journaled in a plurality of bearin 20 which are mountedupon the walls of t e tank 17. Fastened to the spiders 18 are bars 22adapted to support a helical member 23 formed of a rod wound around thebars. The. helical member 23 supports a coarse mesh screen 24. which inturn supports a fine mesh screen 25, the fine mesh screen24 beingcovered by a plurality of rings or dams 26 of any suitable material. Thedams 26. are spaced from each other to provide a plurality of screenedannular passa es 27 through which liquid may flow from t e tank 17 intothe drum 16, the

liquid being discharged through the ends of the drum. The tank 17comprises side walls 32, each of which has a chamber 33 adapted toreceive the liquid discharged through the ends of the drum 16.

passage 35. Means is provided for main taining the liquid containingpulp at a predetermined level in the tank 17. This means is fulldescribed in my copending application erial No. 725,045, filed July9,1924."

As best shown in Figs. 2 and '4, electrical conductors 12 which are tobe subjected to the liquid containing pulp are withdrawn from aplurality of supply reels mounted upon a shaft 66 which is supported byany suitable means. The electrical conductors 12 are trained over aplurality of grooved rollers 70 rotatabl journaled by a shaft 71 mountedin the si e walls 32 of the tank 17. Thegrooved rollers 70 are adaptedto space the conductors 12 a predetermined distance apart and to guide aplurality ofthe conductors to each of the foraminous passages 27. In theembodiment of the invention shown in the accompanying drawings, a pairof conductors 12 is delivered to each screenedpassage 27. A ribbon ofwet pulpous material is applied to each pair of conductors as they arecarried through the tank by the drum. The arrangement is such that somepulp is first strained onto the fine mesh 25 before the conductors arebrought into contact therewith. Then when the conductors contact theinitial layer of pulp on the fine mesh screen 25 and the drum continuesto revolve in the tank, an additional amount of pulp ,will be depositedon each pair of conductors and on the screen. The pulpous materialdeposited upon each pair of conductors and the screen will adhere to theconductors in the form of a ribbon 73, as illustrated in Fig. 7. It willbe noted that the ribbon 73 is common to each of the Spaced conductors12, and that the conductors are embedded in the ribbon.

A woven belt 75 aids in freeing the pulp ribbons from the screens 25when the conductors 12 leave the drum. The belt 75 is held in contactwith the .drum 16 by a felt covered roller 76 which co-acts with thebelt75 and the drum 16 to squeeze excess liquid from the'pulpousmaterial adhering to the conductors. Each pair of conductors 12 and itsassociated ribbon 73 of pulpous material is advanced with the belt 75and between it and. a similar belt 79. The belt 75 is trained over aplurality of rubber covered rollers 80 and 81 and'over a plurality ofrolls 83, the rollers 80 and 81 and the rolls 83 being rotatablyjournaled in a frame 77. Means (not shown) is provided for driving theroller 80 and it-drives the belt 75. which in turn drives the drum 16and the belt 7 9, the belt 79 being held in frictional contact with thebelt 75 by means of a plurality of rubber covered rollers 85 and 86. Therollers 81 and 86 and the rollers 80 and 85 co-act with each other tosqueeze excess moisture from the ribbon 73, the belts 75 and 79 beingsufliciently coarse to allow the liquid to escape therethrough. Thebelts 75 and 79, together with the rollers 80, 81, 85 and 86 prevent thepulp ribbons 73 from losing the form imparted to them by the feltcovered roller 76 and the drum 16, the form so imparted to the ribbons73 being illustrated in Fig. 8. I

A plurality offorming mechanisms 90 are adapted to receive the pairs ofconductors 12 with their ribbons 73 of pulpous material when they aredischarged from the wet end 15, the conductors and ribbons being uidedto the forming mechanisms by a plura ity of sheaves 95. The formingmechanisms 90 are preferably of the type shown and described intheco-pending application of Jespersen, Serial No. 713,704, filed May16, 1924. They are rotatably mounted in a hollow frame 91 and arerotated by suitable means indicated at 92. Each forming mechanism 90 isadapted to receivea pair of conductors 12, together with the associatedulp ribbon 73 and to wrap the pulp ril ibon around itself and around theconductors to form a uniform homogeneous coating for the conductors. Themanner in which the ribbon is wra ped around itself and the conductorsis il uSt-rated in Fig. 9. the fully formedv coating being shown in Fig.10. The forming mechanisms are adapted to draw the conductors 12-embedded in each ribbon 73 toward each other during the forming orwrapping operation. This is advantageous in that it permits theconductors 12 to be spaced an appreciable distance apart when they areadvanced to the drum 16, thus allowing a substantial quantity of fibrouspul to be deposited between the conductors. l uring the formingoperation a portion of the pulp is compressed and clamped between theconductors, and this portion, when dried, serves to insulate theconductors from each other.

The coated conductors are dried in ahousing to which they are advancedovera plurality of sheaves 101 adapted to guide them through a pluralityof apertures 102 formed in one of the walls .of the housing. Thecoatedconductors are drawn over a pluralit of sheaves 103in the housing 100and are ischarged from the housing through a plurality of apertures 105formed in another wall of the housin Means indicated at 106 is providedfor subjecting the pulpous coat- 1n son the conductors to air ofpredetermined relative humidity and predetermined temperature. Thismeans is described in detail in my co-pending application Serial No.716,842, filed May 30,1924. When the coated conductors are dischargedfrom the housing 100 they are guided by a plurality of sheaves 108 to 'aplurality of take-up spools 109 which are driven by any suitable means'(not' shown).

What is claimed is:

1. A method of coating cores in strand form which consists in subjectinga phi rality of cores-to moist pulpous material in such manner that pulpis applied to the cores, and then causing relative lateral motionbetween the cores and a portion of the pulp to formthe pulp into auniform coatin common to said cores retained thereonsolialy by anintermingling of the pulp fibers. 2. A method of coating cores in strand'form which consists in subjecting a plu-' rality of cores to liquidcontainin pulpous material in such manner that pulp-1s ap lied to thecores, removing excess mo sture mm the pulp, and thenwrapping the pulpinto a uniform coating common to said cores.

3. A method of coating cores in strand form which consists in sub ectinga plurality of spaced cores to liquid cohtainin pulp in such; mannerthat pul is applie and then causing relative lateral motion betweenthe-cores and a portion of the pulp on the cores to form a commoncovering therefor.

5. A method of coating cores in strand form which consists in subjectinga plurality of spaced cores to ali ui'd containing pulp in such mannerthat pu p is ap lied t ereto, removing excess liquid from t e pulp, andthentreating the pulp on the cores in such manner that the fibers of thepulp are intermingled to hold the pulp on 2 the cores to form a commoncovering therefor.

6. A method of coating cores in strand form which consists in subjectinga plurality of spaced cores to a 1i uid containln pulp in such mannerthat pu p is applied t ereto,

thereto,

removing excess liquid from the pulp,- and then treating the gulp on thecores in such manner that the bers of the pulp are intermingled to holdthe pulp on the cores to form a common covering therefor, and thendgving the covering.

7. method of coating'cores in strand form which consists in appl ing aribbon of pulp to a plurality of s ace cores, and then causing relativelatera movement between the core and a portion of. the pulp ribbon tocause an intermingling of the fibers of the pulp so that itis firmlyattached to the cores solely by an intermingling of the pulp fibers toform a common covering therefor. 8. A method of coating cores in strandform which consists in appl ing a ribbon of wet pulp to a plurality ospaced cores, removing excess moisture from the ribbon of pulp, and thentreating the pulp to cause an intermingling of the fibers thereof sothat the pulp is firmly attached to thecores solely by an interminglingof the pulp fibers to form a common covering therefor.

9.. A method of coatingcores in strand form which consists in appl ingaribbon of wet pulp to a lurality of spaced cores,

wrapping the rib on around the cores to form a common covering therefor,and then drying the covering.

. 10'. A method of coating cores in strand form which consists inpassing a plurality of'spaced cores through a wet pulp mixture to causethe pulp to be deposited thereon, withdrawing the cores from the mixtureto cause the pulp to cling thereto, and then causing relative lateralmotionfbetween the cores and a portion of the pulp to cause anintermingling of the fibers thereof so that the'pulp is attached to thecores and forms a covering common to the cores.

11. A method of coating cores in strand form which consists in applyinunfinished paper to a. plurality of space cores, and subsequentlycompleting the fabrication of the paper on the cores by causing relativelateral motion between the cores and a portion of the unfinished paperin such manner that" the paper is formed into a covering common to thecores.

122 A method of coating coresin strand form which consists in applying aribbon of unfinished paper to a plurahty of cores, forming theunfinished paper by a wrapping operation to surround the cores andconstitute a common uniform covering therefor, and then drying thecovering.

13. A method of coating cores in strand form which consists in applyingpulpous material to a plurality of spaced cores in such manner that theulpous material holds the cores in spaced relation, and then wrap-' pinga portion of the pulpous material around the, cores to form the glulpousmaterial into a coating common to t e cores and retained thereon solelyby an intermingling of the pulp fibers.

14. A method of coating cores in strand form which consists in embeddinga plurality of cores ina ribbon of pulpous material adapted to hold thecores in spaced relation, and then wrapping the ribbon around the coresforming a common covering therefor and retained thereon solely by anintermingling of the pulp fibers.

15. A method of coating cores in strand form which consists in attachina ribbon of wet pulpous material to a plurality of spaced cores, andthen causing re ative angular displacement between the cores and aportion of the ribbon'to form said ribbon into a homogeneous coatingcommon to the cores.

16. A method of coating cores which consists in subjecting a pluralityof spaced cores to a 'coverlng material while in spacedrelation, causingrelative movement between said cores, and contemporaneously treatingsaid material so that it forms a continuous,

integral and homogeneous coating common to said cores. 17 ,-A method ofcoating cores whichconsists in sub'eeting a plurality of spaced cores instrand orm to aliquid containing pulp in such manner that the cores areembedded in wet pulp, moving'the cores towardeach other, forming the wetpulp into a coating common to said cores, and then drying the coating. a

18 A method-of coating cores, which consists' in embedding a pluralityof spaced cores in strand form in a ribbon of moist pulpous material,causing relative movement between the cores, and contemporaneouslyformin'g'the ribbon of pulpous material into a coating common to bothcores.

19. In apparatus for coating cores with pulp, means for applying wetcellular pulp fibers to a plurality'of cores, and'means for causingrelative lateral motion between the cores and a portion of the pulp toform the pulp into a uniform covering common to said cores.

20. In apparatus for coating. cores with pulp, means including a memberhaving an annular forafminous surface for applying the pulp to aplurality of spaced cores, means for guiding the cores to the foraminoussurface, and means for wrapping'the applied pulp into a uniform coatingcommon to said cores.

21. In apparatus for coating cores, means for applying material to aplurality of spaced cores in strandform so as to form a common coveringfor. the cores, and means for repositioning said cores with respect toeach other. after said common covering has beenapplied.

22. In apparatus for coatin ,cores, means 'for subjecting a plurality -ospaced cores (pulp in such a manto a liquid containing ner that pulp isapplie to the cores,-means for drawing the, cores toward each otherafter the pulp has been applied thereto, and means for. forming theapplied pulp into a uniform coating common to said cores.

In witness whereof, I; hereunto subscribe my name this 15th day ofAugust, A. D.- 1924.

JOHN SHIRLEY LITTLE.

